import Vue from 'vue'
import Router from 'vue-router'

// in development-env not use lazy-loading, because lazy-loading too many pages will cause webpack hot update too slow. so only in production use lazy-loading;
// detail: https://panjiachen.github.io/vue-element-admin-site/#/lazy-loading

Vue.use(Router)

/* Layout */
import Layout from '../views/layout/Layout'

/**
* hidden: true                   if `hidden:true` will not show in the sidebar(default is false)
* alwaysShow: true               if set true, will always show the root menu, whatever its child routes length
*                                if not set alwaysShow, only more than one route under the children
*                                it will becomes nested mode, otherwise not show the root menu
* redirect: noredirect           if `redirect:noredirect` will no redirect in the breadcrumb
* name:'router-name'             the name is used by <keep-alive> (must set!!!)
* meta : {
    title: 'title'               the name show in submenu and breadcrumb (recommend set)
    icon: 'svg-name'             the icon show in the sidebar,
  }
**/
export const constantRouterMap = [
  { path: '/login', component: () => import('@/views/login/index'), hidden: true },
  { path: '/404', component: () => import('@/views/404'), hidden: true },

  {
    path: '/',
    component: Layout,
    redirect: '/teacher',
    name: 'Dashboard',
    hidden: true // 此路由隐藏不在页面中显示
  },

  {
    // 讲师管理 父路由的配置
    path: '/teacher',
    component: Layout,
    // 重定向到哪个子路由进行显示
    redirect: '/teacher/list',
    name: 'Teacher', // 路由名称  一般使用路径名称首字母大写
    meta: { title: '讲师管理', icon: 'eye' }, // meta:元数据 页面中显示的路由的信息
    children: [
      // 讲师管理父路由的 子路由集合，子路由的path 使用相对路径 默认会和父路由的路径拼接
      {
        path: 'list', // /teacher/list
        name: 'TeacherList',
        component: () => import('@/views/teacher/list'),
        meta: { title: '讲师列表', icon: 'table' }
      },
      {
        path: 'save',
        name: 'TeacherSave',
        component: () => import('@/views/teacher/form'),
        meta: { title: '添加讲师', icon: 'tree' }
      },
      {
        //   /teacher/edit  不能被下面的路由匹配
        //   /teacher/edit/a  可以匹配  a会作为id的值在from页面中可以获取使用
        path: 'edit/:id', // :id表示变量    路由中可以通过路径参数的方式 将参数携带到目标页面中
        name: 'TeacherEdit',
        hidden: true, // 隐藏，点击编辑在出来
        component: () => import('@/views/teacher/form'),
        meta: { title: '编辑讲师', icon: 'tree' }
      }
    ]
  },

  {
    // 课程分类管理 父路由的配置
    path: '/subject',
    component: Layout,
    // 重定向到哪个子路由进行显示
    redirect: '/subject/tree',
    name: 'Subject', // 路由名称  一般使用路径名称首字母大写
    meta: { title: '课程分类管理', icon: 'eye' }, // meta:元数据 页面中显示的路由的信息
    children: [
      // 讲师管理父路由的 子路由集合，子路由的path 使用相对路径 默认会和父路由的路径拼接
      {
        path: 'tree', // /teacher/list
        name: 'SubjectTree',
        component: () => import('@/views/subject/tree'),
        meta: { title: '课程分类列表', icon: 'table' }
      },
      {
        path: 'import',
        name: 'SubjectImport',
        component: () => import('@/views/subject/import'),
        meta: { title: '导入课程分类', icon: 'tree' }
      }
    ]
  },

  {
    path: '/course',
    component: Layout,
    // 重定向到哪个子路由进行显示
    redirect: '/course/list',
    name: 'Course', // 路由名称  一般使用路径名称首字母大写
    meta: { title: '课程管理', icon: 'eye' }, // 元数据： 页面中显示的路由的信息
    children: [
      // 讲师管理父路由的 子路由集合，子路由的path 使用相对路径 默认会和父路由的路径拼接
      {
        path: 'list', // /teacher/list
        name: 'CourseList',
        component: () => import('@/views/course/list'),
        meta: { title: '课程列表', icon: 'table' }
      },
      {
        path: 'save',
        name: 'CourseSave',
        component: () => import('@/views/course/form'),
        meta: { title: '发布课程', icon: 'tree' }
      }
    ]
  },

  { path: '*', redirect: '/404', hidden: true }
]

export default new Router({
  // mode: 'history', //后端支持可开
  scrollBehavior: () => ({ y: 0 }),
  routes: constantRouterMap
})
